#include <iostream>
using namespace std;

class Base1 {
    public:
        virtual void f() { cout << "Base1::f" << endl; }
        virtual void g() { cout << "Base1::g" << endl; }
        virtual void h() { cout << "Base1::h" << endl; }

};

class Base2 {
    public:
        virtual void f() { cout << "Base2::f" << endl; }
        virtual void g() { cout << "Base2::g" << endl; }
        virtual void h() { cout << "Base2::h" << endl; }
};

class Base3 {
    public:
        virtual void f() { cout << "Base3::f" << endl; }
        virtual void g() { cout << "Base3::g" << endl; }
        virtual void h() { cout << "Base3::h" << endl; }
};


class Derive : public Base1, public Base2, public Base3 {
    public:
        virtual void f() { cout << "Derive::f" << endl; }
        virtual void g1() { cout << "Derive::g1" << endl; }
};


typedef void(*Fun)(void);

int main()
{
    Fun pFun = NULL;

    Derive d;
    int** pVtab = (int**)&d;

cout << __LINE__ << endl;

    //Base1's vtable
    //pFun = (Fun)*((int*)*(int*)((int*)&d+0)+0);
    pFun = (Fun)pVtab[0][0];
cout << __LINE__ << endl;
    pFun();
cout << __LINE__ << endl;


    //pFun = (Fun)*((int*)*(int*)((int*)&d+0)+1);
    pFun = (Fun)pVtab[0][1];
    pFun();

    //pFun = (Fun)*((int*)*(int*)((int*)&d+0)+2);
    pFun = (Fun)pVtab[0][2];
    pFun();

    //Derive's vtable
    //pFun = (Fun)*((int*)*(int*)((int*)&d+0)+3);
    pFun = (Fun)pVtab[0][3];
    pFun();

    //The tail of the vtable
    pFun = (Fun)pVtab[0][4];
    cout<<pFun<<endl;


    //Base2's vtable
    //pFun = (Fun)*((int*)*(int*)((int*)&d+1)+0);
    pFun = (Fun)pVtab[1][0];
    pFun();

    //pFun = (Fun)*((int*)*(int*)((int*)&d+1)+1);
    pFun = (Fun)pVtab[1][1];
    pFun();

    pFun = (Fun)pVtab[1][2];
    pFun();

    //The tail of the vtable
    pFun = (Fun)pVtab[1][3];
    cout<<pFun<<endl;



    //Base3's vtable
    //pFun = (Fun)*((int*)*(int*)((int*)&d+1)+0);
    pFun = (Fun)pVtab[2][0];
    pFun();

    //pFun = (Fun)*((int*)*(int*)((int*)&d+1)+1);
    pFun = (Fun)pVtab[2][1];
    pFun();

    pFun = (Fun)pVtab[2][2];
    pFun();

    //The tail of the vtable
    pFun = (Fun)pVtab[2][3];
    cout<<pFun<<endl;

    return 0;
}

